Problem	7063
Created	2005-08-11
Source	Encyclopedia of life and death
Rating

Difficulty	2.1 dan
Average Solve Time	56 secs
User Attempts	961 / 3141
Solve Ratio Rating	4 kyu
	rating history

(;GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2] RU[Japanese]SZ[19]KM[0.00] PW[White]PB[Black]AW[ea][cb][eb][bc][dc][fc][dd][ed][fd]AB[da][bb][fb][gb][cc][gc][cd][gd][ce][de][ee][fe][ge]C[Black to play] (;B[ca]CR[ca] ;W[db]CR[db] (;B[aa]CR[aa] ;W[ba]CR[ba] ;B[ca]CR[ca] ;W[bd]CR[bd] (;B[be]CR[be] ;W[ac]CR[ac] (;B[fa]CR[fa]C[RIGHT White can't approach from either side.]) (;B[ae]CR[ae] ;W[da]CR[da] (;B[ad]CR[ad] ;W[ba]CR[ba] ;B[ab]CR[ab]C[RIGHT]) (;B[fa]CR[fa] ;W[ba]CR[ba]C[Ko. Black can do better.]))) (;B[fa]CR[fa] ;W[ad]CR[ad] (;B[be]CR[be] ;W[ab]CR[ab]C[Ko. Black can do better.]) (;B[ab]CR[ab] ;W[ac]CR[ac]C[White lives]) (;B[ac]CR[ac] ;W[ab]CR[ab]C[Ko. Black can do better.]))) (;B[ba]CR[ba] ;W[ab]CR[ab]C[White lives]) (;B[ac]CR[ac] ;W[ba]CR[ba] (;B[ab]CR[ab] ;W[ca]CR[ca]C[White lives]) (;B[ca]CR[ca] ;W[ab]CR[ab]C[White lives])) (;B[bd]CR[bd] ;W[ba]CR[ba] (;B[ac]CR[ac] ;W[ca]CR[ca]C[White lives]) (;B[ca]CR[ca] ;W[ab]CR[ab]C[White lives]))) (;B[ba]CR[ba] ;W[db]CR[db] (;B[ca]CR[ca] ;W[ab]CR[ab]C[White lives]) (;B[ac]CR[ac] ;W[ca]CR[ca]C[White lives]) (;B[bd]CR[bd] ;W[ca]CR[ca]C[White lives])) (;B[ac]CR[ac] ;W[ca]CR[ca]C[White lives]) (;B[ab]CR[ab] ;W[ca]CR[ca]C[White lives]))